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ECE :: Digital Electronics

  1. The number of memory locations in which 14 address bits can access is

  2. A.
    1024
    B.
    2048
    C.
    4096
    D.
    16384

  3. What will be conversion rate for a counter type A/D converter contains a 4 bit binary ladder and a counter driven by a 2 MHz clock. Then conversion time

  4. A.
    125
    B.
    125 x 103
    C.
    125 x 106
    D.
    None

  5. A 6 bit R-2R ladder D/A converter has a reference voltage of 6.5 V. It meets standard linearity then resolution in percent and volts.

  6. A.
    3% 7 V
    B.
    6.4 V, 2%
    C.
    0.1%, 1.57 V
    D.
    1.57%, 0.1 V

  7. What will be output for decimal input 82?

  8. A.
    0.82 V
    B.
    8 V
    C.
    0.1 V
    D.
    10 mV

  9. The circuit of the given figure gives the output Y =

  10. A.
    AB
    B.
    A + B
    C.
    A B
    D.
    A + B

  11. In a 4 bit ripple counter using flip flops with tpd = 40 ns, the maximum frequency can be

  12. A.
    1.25 MHz
    B.
    3.25 MHz
    C.
    6.25 MHz
    D.
    12.5 MHz

  13. The number of product terms in the minimized sum of product expression obtained through the following K-map, where d, don't care.

  14. A.
    2
    B.
    3
    C.
    4
    D.
    5

  15. BCD equivalent of - 810 is

  16. A.
    00110
    B.
    10110
    C.
    11000
    D.
    01000

  17. The number of inputs and outputs in a full adder are

  18. A.
    2 and 1
    B.
    2 and 2
    C.
    3 and 3
    D.
    3 and 2

  19. A + A . B =

  20. A.
    B
    B.
    A . B
    C.
    A
    D.
    A or B